there were now united states president, obama, bush, clinton and carter. president obama honored the legacy. >> nelson mandela taught us the power of action and the power of ideas. the importance of reason. the response of argument. the need to study not only those who you agree with but, also, those who you do not agree with. >> 90 countries knew in representatives from argentina to pakistan to trinidad to china. >> on the streets of south africa memorials large and small to the man who triumphed over apartheid. >> we have to mourn can cry but more important celebrate the life of a great leader. >> after today's memorial, his body will lie in state for three days before he is buried in the childhood village on sunday. black ice causing problems and we can see it. >> yes, we have two lanes that are blocked off, northbound along 280 on the bridge near black mountain road. if you are traveling through san mateo county between burlinggame and hillsborough, watch out for the black ice that happens over the overpasses and bridges because the cooling happens on